JPH05213499A - Reel frame changer - Google Patents

Abstract

PURPOSE:To enable a reel to be wound in the right direction by winding an empty spool in such a manner that the triangular part of the end of the spool formed by cross-cut does not loosen, thus preventing wrinkling. CONSTITUTION:In a reel frame changer for use in the reel part of a paper forming machine in which paper is cut at near its transverse center portion by cross-cut using a high-pressure water jet into the form of an umbrella extending toward both ends and is wound on an empty spool 3 so as to replace a frame, a suction reel drum 1 comprising suction holes 2' provided for the purpose of sucking around the overall periphery of the surface of a reel drum and in the required width portion of the center portion of the drum is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel frame changing device provided in a reel part of all paper machines (including coaters) of paper making speed, machine width and paper quality.

[Prior Art]

FIG. 3 shows a reel frame changing device of a conventional paper machine. The conventional reel frame changing device includes a reel drum 21, an empty spool 22, a reel spool 22 ', a primary arm 23, a paper roll 24, a cutting device 25,
It comprises a cutter 26, a glue spraying device 27, an air nozzle (gooseneck) 28, and a paper roll 29. Just before the predetermined amount of paper is wound on the reel spool 22 ', the empty spool 22 is started and accelerated by a spool starter (not shown) at the standby position and moved by the primary arm 23 when the speed becomes the same as the paper. Let reel drum 2
1 is touch-tuned and placed at a predetermined position to complete the preparation.

Next, when a predetermined amount of paper is wound up, the air nozzle 2
8 is sprayed at the position shown in the drawing, and at the same time, the cutter 26 of the cutting device 25 is operated to cross-cut the paper width with the cutter 26. At this time, the cutter 26 uses a metal blade or the like (FIG. 4). When the cutter 26 is started and cross-cut, the glue is immediately sprayed on the cross-cut triangular portion (FIG. 4) by the glue spraying device, and this portion passes through the nip portion where the empty spool 22 and the reel drum 21 are in contact with each other. At this time, the triangular portion is attached to the empty spool 22 due to the adhesive force of the glue, and at the same time, the empty spool 22 is wound up. When winding the spool 22, the air is blown by the air nozzle (gooseneck) 28 so that the tip of the triangular portion can be wound around the spool 22 without bending. Then, the paper cut into an umbrella shape by the cutting device is continuously wound on the empty spool, and the winding is completed. After that, the winding paper 29 is moved to the end of the rail, and the new spool 22 'is moved and set on the rail by the primary arm 23, and the predetermined length of winding is performed.

[0004]

According to the above-mentioned conventional apparatus, when changing the frame, the triangular portion at the tip of the cross cut loses the paper tension due to the cutting, and the tip is loosened and enters the nip of the empty spool 22. Wrinkles are likely to occur, and winding on the empty spool 22 is not performed in the correct direction (meaning a deviation in the width direction caused by loosening of the tip due to cross-cutting). Therefore, as the winding width increases The sheet will meander, causing wrinkles or paper breaks. Further, in the case of a relatively thin paper, the effect of the looseness causes the loosened paper after cutting, which may cause a paper break at the time of frame change due to the fluctuation of the paper tension. The present invention has been proposed to solve the above conventional problems.

[0005]

Therefore, according to the present invention, the paper is wound around an empty spool around the central portion in the width direction of the paper by cross-cutting using a high-pressure water jet in both ends. In a reel frame changing device in a reel part of a paper machine that changes frames, a suction reel drum for sucking by providing suction holes is provided all around the drum surface of a necessary width portion in the central portion of the reel drum. , This is a means for solving the problems.

[0006]

According to the present invention, the suction holes are arranged in the central portion of the reel drum surface so that the triangular portion at the tip of the paper due to the cross cut does not become loose and wrinkles do not occur when entering the nip of the empty spool. Then, a suction reel drum for sucking the inside of the roll is provided. When the preparation for frame change is completed, the vacuum of the suction reel drum is activated to raise the vacuum value. Next, the cutting device is operated to cross-cut the seat web with a high-pressure water jet.
At approximately the same time, the double-sided adhesive tape is inserted into the cross-cut triangular portion (or the glue is sprayed at the same position by the glue spraying device). As soon as the adhesive tape or the glue spraying portion passes through the nip portion between the empty spool and the suction reel drum, the triangular portion is immediately wound on the empty spool. And when the tip of the paper is taken up on the empty spool, it is prevented from bending and the air nozzle (gooseneck) is used to supplementally blow the air jet to ensure the take-up. If the length of the adhesive tape portion and the triangular tip paper is short, it is not always necessary.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments of the drawings. FIGS. 1 and 2 show a reel frame changing device using a suction reel drum showing an embodiment of the present invention. This reel frame changing device includes a suction reel drum 1, a suction box 2, a suction hole 2 ', an empty spool 3, a reel spool 3', a cutting device 4, a high-pressure water jet 5, a double-sided adhesive tape supply device 6, an air nozzle (gooseneck). ) 7,
It is composed of a paper roll 8 and a paper roll 9. The suction reel irregularity 1 is provided with suction holes 2'in the width of several m / m to several hundred m / m (preferably several tens to 100 m / m) at the center of the machine, and a suction box 2 corresponding to this is provided inside the roll. Is installed, and it is taken out from the tip of the roll and connected to a vacuum pump. The high vacuum vacuum is activated only when the reel frame is changed, and the vacuum is always stopped. In this embodiment, the suction box is provided inside the drum, but it is also possible to use a system in which only suction is indirectly performed from the roll shaft end hole. In this case, the suction box is unnecessary. Regarding the method of changing the frame, the same method as that described in the prior art is used until the empty spool is ready. After preparation of the empty spool, the vacuum value of the suction reel drum 1 is set to a high vacuum value (normally several hundred mm).

Next, the high-pressure water jet 5 of the cutting device 4 is operated to start the cross-cut cutting. In this case, when the double-sided adhesive tape supplying device 6 (or the adhesive spraying device) is operated with an extremely slight time difference, and the adhesive tape is inserted (or adhesive is sprayed) into the triangular portion of the sheet end portion by the cross cut, When the adhesive tape or the glue spraying section passes through the nip of the empty spool, the adhesive tape and the end portion of the sheet are wound on the empty spool by the adhesive force. When the full width of the web is cut by the cross cut, the full width winding onto the empty spool is completed. At this time, the air nozzle (gooseneck) 7 is additionally blown by an air jet to perform winding in order to ensure the winding on the empty spool 3. In the present embodiment, the winding on the new spool is performed on the drum roll, but the present invention is not limited to this, and after the new spool is transferred to the horizontal rail, it is first started on the horizontal rail. The frame may be changed, or it may be at any position on the drum.

[0009]

As described above in detail, according to the present invention, the end portion of the sheet web by cross cutting is smoothly wound around the empty spool without being loosened by the suction force of the suction reel drum even after cutting. You can take money. For this reason, it is possible to minimize the spoilage due to under-winding on the empty spool. Further, since the paper tension does not fluctuate, it is possible to reduce the occurrence of paper breakage when changing the frame and improve the operation efficiency. Further, since the reel is wound onto the empty spool by a combination of the suction reel drum and the adhesive tape or glue spraying, it is possible to easily and smoothly change the frame even in the range from thick paper to thin paper of all paper types.

[Brief description of drawings]

FIG. 1 is a side sectional view of a reel frame changing device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a suction width of a suction reel drum and a state in which an adhesive tape is attached by cross-cutting with respect to the paper width in FIG.

FIG. 3 is a side view of a conventional reel frame changing device.

FIG. 4 is a plan view showing a cross-cut by a cutter and a spraying state of glue on the paper width in FIG.

[Explanation of symbols]

 1 Suction reel drum 2 Suction box 2'Suction hole 3 Empty spool 4 Cutting device 5 High-pressure water jet 6 Double-sided adhesive tape supply device 7 Air nozzle 8 Paper roll 9 Paper roll

Claims (1)

[Claims] 1. A reel part of a paper machine, which cuts the vicinity of a central portion in the width direction of paper into an umbrella shape in both end directions by a cross cut using a high-pressure water jet, and winds the paper on an empty spool to change the frame. In the reel frame changing device, the reel frame changing device is provided with a suction reel drum which is provided with suction holes all around the drum surface in a required width portion in the center of the reel drum.